USPS Flat Rate Envelopes & Boxes | Rate Table

What are USPS Flat Rate Envelopes?

With USPS Flat Rate Envelopes, if it fits, it ships for one low rate. When sealing the envelope, the container flaps must be able to close within the normal folds. Learn more about USPS Flat Rate Envelope dimensions.

Most USPS Flat Rate Envelopes have a maximum contents weight of 70lbs. If you are shipping internationally, be sure to check the country restrictions to determine if lower weight limits apply.

For international shipments, USPS uses Country Price Groups to calculate shipping rates. Learn more about Country Price Groups.

Compare 2019 Rates: USPS Flat Rate Envelopes & Boxes

USPS Flat Rate Envelopes - Domestic (2019)
Service Flat Rate Type Retail Rates Commercial Rates
Priority Mail Envelope 7.35 6.95
Padded Envelope 8.00 7.55
Legal Envelope 7.65 7.25
Priority Mail Express Envelope 25.50 22.68
Padded Envelope 26.20 23.18
Legal Envelope 25.70 22.80

 

USPS Flat Rate Boxes - Domestic (2019)
Service Flat Rate Retail Rates Commercial Rates
Priority Mail Small Box
7.90 7.50
Medium Box 14.35 12.80
Large Box 19.95 17.60
APO Large Box 18.45 16.10

 

USPS Flat Rate Envelopes - International
Retail Rates (2019)
Service Prices by Country Price Group
1 Canada 2 3 4 5 6 7 8
Priority Mail - 25.85 32.20 33.60 35.65 34.65 36.70 34.65 35.65

Priority Mail
Express

44.50 - 61.85 65.85 64.25 66.50 67.00 64.95 67.90

 

USPS Flat Rate Envelopes - International
Commercial Rates (2019)
Service Prices by Country Price Group
1 Canada 2 3 4 5 6 7 8
Priority Mail - 24.55 30.60 31.90 33.85 32.90 34.85 32.90 33.85
Priority Mail
Express
42.30 - 56.75 61.95 59.45 62.55 64.60 61.90 63.00

 

USPS Flat Rate Boxes - International (2019)
Retail Rates
Service Flat Rate
Prices by Country Price Group
Canada
2 3 4 5 6 7 8
Priority Mail Small Box 26.85 33.60 34.65 36.70 35.65 37.70 35.65 36.70
Medium Box 49.60 72.30 73.70 71.75 75.75 82.20 74.75 77.80
Large Box 64.50 94.25 96.30 94.25 98.35 103.85 97.35 101.80

 

USPS Flat Rate Boxes - International (2019)
Commercial Rates
Service Flat Rate
Prices by Country Price Group
Canada
2 3 4 5 6 7 8
Priority Mail Small Box 25.50 31.90 32.90 34.85 33.85 35.80 33.85 34.85
Medium Box 47.10 68.70 70.00 68.15 71.95 78.10 71.00 73.90
Large Box 61.30 89.55 91.50 89.55 93.45 98.65 92.50 96.70

2020 Rates: USPS Flat Rate Envelopes & Boxes

Effective January 26, 2020. Learn more about 2020 rates.
USPS Flat Rate Envelopes - Domestic (2020)
 Service Flat Rate Type Retail Rates Commercial Rates
Priority Mail Envelope 7.75 7.15
Legal Envelope 8.05 7.45
Padded Envelope 8.40 7.75
Priority Mail Express Envelope 26.35 22.75
Legal Envelope 26.50 22.95
Padded Envelope 26.95 23.25

 

USPS Flat Rate Boxes - Domestic (2020)
 Service Flat Rate Type Retail Rates Commercial Rates
Priority Mail Small Box
8.30 7.65
Medium Box
15.05 13.20
Large Box
21.10 18.30
APO Large Box 19.60 16.80

 

USPS Flat Rate Envelopes - International (2020)
Retail Rates
Service Prices by Country Price Group
1 Canada 2 3 4 5 6 7 8
Priority Mail - 26.90 33.75 35.35 37.45 36.45 38.60 36.45 37.45

Priority Mail
Express

45.95 - 61.65 66.50 64.95 64.95 69.35 64.85 68.95

 

USPS Flat Rate Envelopes - International (2020)
Commercial Rates
Service Prices by Country Price Group
1 Canada 2 3 4 5 6 7 8
Priority Mail - 25.55 32.05 33.60 35.60 34.65 36.65 34.65 35.60
Priority Mail
Express
42.85 - 56.75 62.45 60.95 60.95 65.95 59.80 61.75

 

USPS Flat Rate Boxes - International (2020)
Retail Rates
Service Flat Rate
Prices by Country Price Group
Canada
2 3 4 5 6 7 8
Priority Mail Small Box 27.90 35.35 36.45 38.60 37.45 39.60 37.45 38.60
Medium Box 51.55 75.95 77.50 75.35 79.65 86.40 78.60 81.75
Large Box 67.05 99.10 101.20 99.10 103.35 109.15 102.35 107.05

 

USPS Flat Rate Boxes - International (2020)
Commercial Rates
Service Flat Rate
Prices by Country Price Group
Canada
2 3 4 5 6 7 8
Priority Mail Small Box 26.50 33.60 34.65 36.65 35.60 37.60 35.60 36.65
Medium Box 48.95 72.15 73.65 71.60 75.65 82.10 74.65 77.65
Large Box 63.70 94.15 96.15 94.15 98.20 103.70 97.25 101.70

 

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